44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
#pragma once
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#ifndef PERMUTED_RANGE_H
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#define PERMUTED_RANGE_H
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// boost includes
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#include <boost/range.hpp>
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#include <boost/iterator/permutation_iterator.hpp>
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/*!
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\file permuted_range.h
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\brief Contains a range creator for boost::permutation_iterator objects.
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*/
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namespace tcg {
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template <typename ElemRng, typename IndxRng>
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struct _perm_rng_traits {
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typedef boost::permutation_iterator<
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typename boost::range_iterator<ElemRng>::type,
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typename boost::range_iterator<IndxRng>::type>
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iterator;
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typedef std::pair<iterator, iterator> range;
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};
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//**********************************************************************************
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// Permuted Range creator
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//**********************************************************************************
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template <typename ElementsRng, typename IndexesRng>
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typename _perm_rng_traits<ElementsRng, const IndexesRng>::range permuted_range(
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ElementsRng &erng, const IndexesRng &irng) {
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typedef typename _perm_rng_traits<ElementsRng, const IndexesRng>::range range;
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typedef typename _perm_rng_traits<ElementsRng, const IndexesRng>::iterator
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iterator;
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return range(iterator(boost::begin(erng), boost::begin(irng)),
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iterator(boost::begin(erng), boost::end(irng)));
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}
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} // namespace tcg
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#endif // PERMUTED_RANGE_H
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